Among the world's most valuable brands, Starbucks, Dell, eBay, Google, and Microsoft best leverage social media to interact with customers online, according to a study by Altimeter Group and Wetpaint (via Techcrunch).

The ENGAGEMENTdb study (pdf), led by analyst Charlene Li, a Partner at Altimeter, determined the engagement score of the brands by looking at their use of 11 social-media channels and their level of engagement within each channel.

Engagement by Industry

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